diff --git a/l1-contracts/src/core/libraries/ConstantsGen.sol b/l1-contracts/src/core/libraries/ConstantsGen.sol
index cc3cb5ba3890..6153b55b63d8 100644
--- a/l1-contracts/src/core/libraries/ConstantsGen.sol
+++ b/l1-contracts/src/core/libraries/ConstantsGen.sol
@@ -100,9 +100,9 @@ library Constants {
   uint256 internal constant INITIAL_L2_BLOCK_NUM = 1;
   uint256 internal constant BLOB_SIZE_IN_BYTES = 126976;
   uint256 internal constant ETHEREUM_SLOT_DURATION = 12;
-  uint256 internal constant AZTEC_SLOT_DURATION = 36;
+  uint256 internal constant AZTEC_SLOT_DURATION = 12;
   uint256 internal constant AZTEC_EPOCH_DURATION = 48;
-  uint256 internal constant IS_DEV_NET = 0;
+  uint256 internal constant IS_DEV_NET = 1;
   uint256 internal constant FEE_JUICE_INITIAL_MINT = 20000000000;
   uint256 internal constant MAX_PACKED_PUBLIC_BYTECODE_SIZE_IN_FIELDS = 20000;
   uint256 internal constant MAX_PACKED_BYTECODE_SIZE_PER_PRIVATE_FUNCTION_IN_FIELDS = 3000;
diff --git a/noir-projects/noir-protocol-circuits/crates/types/src/constants.nr b/noir-projects/noir-protocol-circuits/crates/types/src/constants.nr
index 6a3f13e020f1..c598ac5f229c 100644
--- a/noir-projects/noir-protocol-circuits/crates/types/src/constants.nr
+++ b/noir-projects/noir-protocol-circuits/crates/types/src/constants.nr
@@ -132,9 +132,9 @@ global INITIALIZATION_SLOT_SEPARATOR: Field = 1000_000_000;
 global INITIAL_L2_BLOCK_NUM: Field = 1;
 global BLOB_SIZE_IN_BYTES: Field = 31 * 4096;
 global ETHEREUM_SLOT_DURATION: u32 = 12;
-global AZTEC_SLOT_DURATION: u32 = ETHEREUM_SLOT_DURATION * 3;
+global AZTEC_SLOT_DURATION: u32 = ETHEREUM_SLOT_DURATION * 1;
 global AZTEC_EPOCH_DURATION: u32 = 48;
-global IS_DEV_NET: bool = false;
+global IS_DEV_NET: bool = true;
 // The following and the value in `deploy_l1_contracts´ must match. We should not have the code both places, but
 // we are running into circular dependency issues. #3342
 global FEE_JUICE_INITIAL_MINT: Field = 20000000000;
diff --git a/yarn-project/circuits.js/src/constants.gen.ts b/yarn-project/circuits.js/src/constants.gen.ts
index 8d90cfac636a..4cd2b2db84e2 100644
--- a/yarn-project/circuits.js/src/constants.gen.ts
+++ b/yarn-project/circuits.js/src/constants.gen.ts
@@ -86,9 +86,9 @@ export const INITIALIZATION_SLOT_SEPARATOR = 1000000000;
 export const INITIAL_L2_BLOCK_NUM = 1;
 export const BLOB_SIZE_IN_BYTES = 126976;
 export const ETHEREUM_SLOT_DURATION = 12;
-export const AZTEC_SLOT_DURATION = 36;
+export const AZTEC_SLOT_DURATION = 12;
 export const AZTEC_EPOCH_DURATION = 48;
-export const IS_DEV_NET = 0;
+export const IS_DEV_NET = 1;
 export const FEE_JUICE_INITIAL_MINT = 20000000000;
 export const MAX_PACKED_PUBLIC_BYTECODE_SIZE_IN_FIELDS = 20000;
 export const MAX_PACKED_BYTECODE_SIZE_PER_PRIVATE_FUNCTION_IN_FIELDS = 3000;
diff --git a/yarn-project/sequencer-client/src/sequencer/sequencer.test.ts b/yarn-project/sequencer-client/src/sequencer/sequencer.test.ts
index e1f546814ee7..bdd809fd15e4 100644
--- a/yarn-project/sequencer-client/src/sequencer/sequencer.test.ts
+++ b/yarn-project/sequencer-client/src/sequencer/sequencer.test.ts
@@ -103,6 +103,7 @@ describe('sequencer', () => {
       BigInt(lastBlockNumber),
       block.header.lastArchive.toBuffer(),
     ]);
+    publisher.getValidatorCount.mockResolvedValue(0n);
 
     globalVariableBuilder = mock<GlobalVariableBuilder>();
     merkleTreeOps = mock<MerkleTreeOperations>();
@@ -190,7 +191,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,
@@ -231,7 +232,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,
@@ -250,6 +251,8 @@ describe('sequencer', () => {
       BigInt(lastBlockNumber),
       block.header.lastArchive.toBuffer(),
     ]);
+    // Specify that there is a validator, such that we don't allow everyone to publish
+    publisher.getValidatorCount.mockResolvedValueOnce(1n);
 
     await sequencer.initialSync();
     await sequencer.work();
@@ -294,7 +297,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,
@@ -346,7 +349,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,
@@ -498,7 +501,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,
@@ -560,7 +563,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,
@@ -619,7 +622,7 @@ describe('sequencer', () => {
     const mockedGlobalVariables = new GlobalVariables(
       chainId,
       version,
-      new Fr(lastBlockNumber + 1),
+      block.header.globalVariables.blockNumber,
       block.header.globalVariables.slotNumber,
       Fr.ZERO,
       coinbase,